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Introduction: Treatment with biologics for severe asthma is informed by international and national guidelines and defined by national regulating bodies, but how these drugs are used in real-life is unknown., Materials and Methods: The European Respiratory Society (ERS) SHARP Clinical Research Collaboration conducted a three-step survey collecting information on asthma biologics use in Europe. Five geographically distant countries defined the survey questions, focusing on seven end-points: biologics availability and financial issues, prescription and administration modalities, inclusion criteria, continuation criteria, switching biologics, combining biologics and evaluation of corticosteroid toxicity. The survey was then sent to SHARP National Leads of 28 European countries. Finally, selected questions were submitted to a broad group of 263 asthma experts identified by national societies., Results: Availability of biologics varied between countries, with 17 out of 28 countries having all five existing biologics. Authorised prescribers (pulmonologists and other specialists) also differed. In-hospital administration was the preferred deliverance modality. While exacerbation rate was used as an inclusion criterion in all countries, forced expiratory volume in 1 s was used in 46%. Blood eosinophils were an inclusion criterion in all countries for interleukin-5 (IL-5)-targeted and IL-4/IL-13-targeted biologics, with varying thresholds. There were no formally established criteria for continuing biologics. Reduction in exacerbations represented the most important benchmark, followed by improvement in asthma control and quality of life. Only 73% (191 out of 263) of surveyed clinicians assessed their patients for corticosteroid-induced toxicity., Conclusion: Our study reveals important heterogeneity in the use of asthma biologics across Europe. To what extent this impacts on clinical outcomes relevant to patients and healthcare services needs further investigation., Competing Interests: Conflict of interest: L.G. Heaney reports the following relationships outside the submitted work: academic lead for the UK MRC Consortium for Stratified Medicine in Severe Asthma (industrial pharma partners: Amgen, AstraZeneca, Medimmune, Janssen, Novartis, Roche/Genentech, GlaxoSmithKline and Boehringer Ingelheim); project grant funding from Medimmune, Novartis UK, Roche/Genentech and GlaxoSmithKline; travel funding support to international respiratory meetings received from AstraZeneca, Chiesi, Novartis, Boehringer Ingelheim, Teva and GlaxoSmithKline; participated on advisory boards for AstraZeneca, Novartis, GlaxoSmithKline, Chiesi, Teva, Theravance and Vectura. Conflict of interest: B. Dahlén reports the following relationships outside the submitted work: grant received from GSK and Novartis to support Karolinska Severe Asthma Centre; personal consulting fees received from GSK, Novartis, Teva and AstraZeneca; consulting fees, paid to the institution, received from Region Stockholm; personal honoraria received from GSK, Novartis, Teva and AstraZeneca. Conflict of interest: S. Popović-Grle reports the following relationships outside the submitted work: payment for educational events from Abbot, Alkaloid, AstraZeneca, BerlinChemie Menarini, Boehringer Ingelheim, Medis, Novartis, Pliva-Teva, PharmaS, Providens, Salvus, Sandoz, Sanofi-Aventis and SwixxPharma; participation on advisory boards for AstraZeneca, Boehringer Ingelheim, BerlinChemie Menarini, GSK, Novartis, Pliva-Teva, PharmaS, Sanofi-Aventis and SwixxPharma. Conflict of interest: V. Sedlák reports the following relationships outside the submitted work: payment for presentations received from AstraZeneca, Novartis, GlaxoSmithKline, TEVA and Sanofi; payment for expert testimony payments received from AstraZeneca, Novartis, GlaxoSmithKline, TEVA and Sanofi; payment for participation on a data safety monitoring board or advisory board received from AstraZeneca, Novartis, GlaxoSmithKline, TEVA and Sanofi. Conflict of interest: L. Lehtimäki reports the following relationships outside the submitted work: fees for lectures or advisory board meetings received from ALK, AstraZeneca, Boehringer Ingelheim, Chiesi, Circassia, GSK, Mundipharma, Novartis, Orion Pharma and Sanofi; owner of shares for Ausculthing OY. Conflict of interest: A. Bourdin reports the following relationships outside the submitted work: unrestricted grants received from AstraZeneca and Boehringer Ingelheim; consulting fees received from Astra Zeneca, GSK, Novartis, Sanofi Regeneron, Boehringer Ingelheim and Chiesi; payment or honoraria received for lectures, presentations, speakers bureaus, manuscript writing or educational events received from AstraZeneca, GSK, Novartis, Sanofi Regeneron, Boehringer Ingelheim and Chiesi; support for attending meetings and/or travel received from Astra Zeneca, GSK, Novartis, Sanofi Regeneron, Boehringer Ingelheim and Chiesi. Conflict of interest: S. Korn reports the following relationships outside the submitted work: consulting fees received from AstraZeneca, Novartis, GlaxoSmithKline and Sanofi; payment or honoraria received for lectures and presentations from AstraZeneca, Novartis, GlaxoSmithKline and Sanofi; participation on a data safety monitoring board or advisory board for AstraZeneca, Novartis and GlaxoSmithKline. Conflict of interest: M.W. Butler reports the following relationships outside the submitted work: payment or honoraria received for lectures and presentations from AstraZeneca, Novartis and GlaxoSmithKline; support received for international meeting attendance received from AstraZeneca; participation on Advisory Boards for ALK Abello, AstraZeneca, GlaxoSmithKline and Novartis; Chair of Medical Advisory Group, board member of Asthma Society of Ireland, Ireland member of GINA Assembly, President of Irish Thoracic Society (2022 to present). Conflict of interest: G.W. Canonica reports the following relationships outside the submitted work: payment or honoraria for lectures, presentations, speakers’ bureaus, manuscript writing or educational events received from AstraZeneca, GSK, Novartis and Sanofi; participation on a data safety monitoring board or advisory board for AstraZeneca, GSK, Novartis and Sanofi; leadership or fiduciary role in other board, society, committee or advocacy group for EAACI Methodology Committee, REG Vice President and SANI Steering Committee. Conflict of interest: K. Beiksiene reports the following relationships outside the submitted work: payment or honoraria received for lectures, presentations, speakers’ bureaus, manuscript writing or educational events received from AstraZeneca and Berlin Chemie. Conflict of interest: A. ten Brinke reports the following relationships outside the submitted work: unrestricted grants received from TEVA, GSK and AstraZeneca; consulting fees paid to the institution from GSK, Sanofi, TEVA, AstraZeneca and Boehringer Ingelheim; payments for lectures, paid to the institution, received from GSK, TEVA, AstraZeneca and Sanofi; participation on research advisory boards for GSK, Sanofi, AstraZeneca, Boehringer Ingelheim and TEVA; Chair of Dutch severe asthma registry RAPSODI. Conflict of interest: P. Kuna reports the following relationships outside the submitted work: personal fees received for lectures, presentations, speakers’ bureaus, manuscript writing or educational events received from Adamed, AstraZeneca, Boehringer Ingelheim, Berlin Chemie Menarini, Alvogen, Glenmark, Novartis, GSK, Chiesi, Polpharma and Teva. Conflict of interest: C. Chaves Loureiro reports the following relationships outside the submitted work: Consulting fees received from AstraZeneca and GSK. Payment for r presentations and speakers bureaus received from AstraZeneca, GSK, Novartis and Sanofi-Aventis. Support for attending meetings received from AstraZeneca, Novartis, Nippon, Sanofi-Aventis, Tecnifarma and VitalAire. Participation on Advisory Boards for AstraZeneca, GSK, Novartis and Sanofi-Aventis. Conflict of interest: Z. Lazic reports the following relationships outside the submitted work: payment or honoraria for educational events received from AstraZeneca, BerlinChemie Menarini, Boehringer Ingelheim, Novartis, PharmaS, Providens, Sandoz and Actavis-Teva Serbia; participation on Advisory Boards for AstraZeneca, Boehringer Ingelheim, BerlinChemie Menarini, Novartis and Actavis-Teva Serbia. Conflict of interest: S. Škrgat reports the following relationships outside the submitted work: honoraria received for lectures and educational events from Astra Zeneca, Pliva Teva, Berlin Chemie, Chiesi and Medis; participation on local advisory boards organized by AstraZeneca. Conflict of interest: J. Leuppi reports the following relationships outside the submitted work: J. Leuppi is supported by grants from the Swiss National Science Foundation (SNF 160072 and 185592) and by Swiss Personalised Health Network (SPHN 2018DR108); J. Leuppi has also received unrestricted grants from AstraZeneca AG Switzerland, Boehringer Ingelheim GmbH Switzerland, GSK AG Switzerland, and Novartis AG Switzerland. Conflict of interest: B. Gemicioglu reports the following relationships outside the submitted work: grants or contracts received from AstraZeneca, Novartis, GlaxoSmithKline and Sanofi; payment or honoraria received for lectures, presentations, speakers’ bureaus, manuscript writing or educational events received from Novartis; support for attending meetings received from Novartis; participation on a data safety monitoring board or advisory board for GlaxoSmithKline. Conflict of interest: A. Bossios reports the following relationships outside the submitted work: payment or honoraria received for lectures, presentations, speakers’ bureaus, manuscript writing or educational events received from Astra Zeneca, GSK and TEVA; support for attending meetings and/or travel received from Novartis; participation on a data safety monitoring board or advisory board for AstraZeneca, Novartis, GlaxoSmithKline, TEVA and Sanofi; member of the steering committee of SHARP, Secretary of Assembly 5 (Airway diseases, asthma, COPD and chronic cough), European Respiratory Society; vice-chair of Nordic Severe Asthma Network (NSAN). Conflict of interest: C.M. Porsbjerg reports the following relationships outside the submitted work: grants or contracts, paid to the institution, received from AZ, GSK, Novartis, TEVA, Sanofi, Chiesi and ALK; consulting fees received from AZ, GSK, Novartis, TEVA, Sanofi, Chiesi and ALK; payment or honoraria for lectures, presentations, speakers’ bureaus, manuscript writing or educational events received from AZ, GSK, Novartis, TEVA, Sanofi, Chiesi and ALK; participation on a data safety monitoring board or advisory board for AZ, GSK, Novartis, TEVA, Sanofi, Chiesi and ALK. Conflict of interest: E.H. Bel reports the following relationships outside the submitted work: research grants received from GSK and Teva; consulting fees received from Teva, Sanofi, AstraZeneca, GSK, Sterna and Chiesi; participation on a data safety monitoring board or advisory board for AstraZeneca. Conflict of interest: R. Djukanovic reports the following relationships outside the submitted work: funding received for the SHARP CRC from ERS, TEVA, GSK, Novartis, Sanofi and Chiesi; consultancy fees paid to the author received from Synairgen plc, Sanofi-Genzyme Corporation and Galapagos; honorarium for lectures paid to the author received from GlaxoSmithKline, Congress of Interasma, AstraZeneca and Airways Vista, Seoul; personal shares owned for Synairgen. Conflict of interest: L. Renaud reports receiving support for the present manuscript from SHARP CRC supported by GSK, Novartis, Sanofi, Chiesi and Teva. The following relationships are reported outside the submitted work: grants or contracts received from GSK, AZ and Chiesi; consulting fees received from AZ and Sanofi; payment or honoraria for lectures, presentations, speakers’ bureaus, manuscript writing or educational events, received from AZ, GSK and Chiesi; patents planned, issued or pending WO 2017/050527 A1 “Method for the diagnosis of airway disease inflammatory subtype”. Conflict of interest: The remaining authors have nothing to disclose., (Copyright ©The authors 2022.)

Little is known about the characteristics and treatments of patients with severe asthma across Europe, but both are likely to vary. This is the first study in the European Respiratory Society Severe Heterogeneous Asthma Research collaboration, Patient-centred (SHARP) Clinical Research Collaboration and it is designed to explore these variations. Therefore, we aimed to compare characteristics of patients in European severe asthma registries and treatments before starting biologicals.This was a cross-sectional retrospective analysis of aggregated data from 11 national severe asthma registries that joined SHARP with established patient databases.Analysis of data from 3236 patients showed many differences in characteristics and lifestyle factors. Current smokers ranged from 0% (Poland and Sweden) to 9.5% (Belgium), mean body mass index ranged from 26.2 (Italy) to 30.6 kg·m -2 (the UK) and the largest difference in mean pre-bronchodilator forced expiratory volume in 1 s % predicted was 20.9% (the Netherlands versus Hungary). Before starting biologicals patients were treated differently between countries: mean inhaled corticosteroid dose ranged from 700 to 1335 µg·day -1 between those from Slovenia versus Poland when starting anti-interleukin (IL)-5 antibody and from 772 to 1344 µg·day -1 in those starting anti-IgE (Slovenia versus Spain). Maintenance oral corticosteroid use ranged from 21.0% (Belgium) to 63.0% (Sweden) and from 9.1% (Denmark) to 56.1% (the UK) in patients starting anti-IL-5 and anti-IgE, respectively.The severe asthmatic population in Europe is heterogeneous and differs in both clinical characteristics and treatment, often appearing not to comply with the current European Respiratory Society/American Thoracic Society guidelines definition of severe asthma. Treatment regimens before starting biologicals were different from inclusion criteria in clinical trials and varied between countries., Competing Interests: Conflict of interest: J.J.M.H. van Bragt has nothing to disclose. Conflict of interest: I.M. Adcock has nothing to disclose. Conflict of interest: E.H.D. Bel reports grants and personal fees from AstraZeneca, GSK and Novartis, grants from Teva, and personal fees from Boehringer Ingelheim, Sanofi/Regeneron, Vectura and Sterna, outside the submitted work. Conflict of interest: G-J. Braunstahl reports grants from GSK, Novartis, AstraZeneca and Chiesi, outside the submitted work. Conflict of interest: A. Ten Brinke reports institutional fees for research advisory boards and lectures from GSK, Teva and AstraZeneca, institutional fees for research advisory boards from Sanofi, Novartis and Boehringer Ingelheim, outside the submitted work. Conflict of interest: J. Busby has nothing to disclose. Conflict of interest: G.W. Canonica reports personal fees from A. Menarini, AstraZeneca, Boehringer Ingelheim, Chiesi Farmaceutici, Circassia, GSK, MSD, Novartis, Roche, Sanofi-Aventis and Teva, during the conduct of the study. Conflict of interest: H. Cao is an employee of Novartis, which is one of the funding pharmaceutical companies of SHARP. Conflict of interest: K.F. Chung has received honoraria for participating in advisory board meetings from GSK, AstraZeneca, Novartis, Merck, Boehringer Ingelheim and Teva regarding treatments for asthma and chronic obstructive pulmonary disease and has also been remunerated for speaking engagements. Conflict of interest: Z. Csoma has nothing to disclose. Conflict of interest: B. Dahlén reports advisory board membership for Teva, GSK and Sanofi, personal fees for lectures from AstraZeneca, outside the submitted work. Conflict of interest: E. Davin has nothing to disclose. Conflict of interest: S. Hansen has nothing to disclose. Conflict of interest: E. Heffler reports personal fees from AstraZeneca, Sanofi Genzyme, Teva, Novartis, GSK, Circassia and Nestle Purina, outside the submitted work. Conflict of interest: I. Horvath reports personal fees from AstraZeneca, Boehringer Ingelheim, GSK, Chiesi, Berlin-Chemie, Roche, MSD, CSL and Sager Pharma, outside the submitted work. Conflict of interest: S. Korn reports personal fees from Almirall, AstraZeneca, Boehringer Ingelheim, Chiesi, Teva and Roche, grants and personal fees from GSK and Novartis, during the conduct of the study. Conflict of interest: M. Kots is a full time Chiesi Famaceutici SpA employee, Global clinical development department. Conflict of interest: P. Kuna reports personal fees for lectures and advisory board work from AstraZeneca and Novartis, personal fees for lectures and nonfinancial support for meeting attendance from Berlin-Chemie, Menarini and Boehringer Ingelheim, outside the submitted work. Conflict of interest: N. Kwon is an employee of GSK. Conflict of interest: R. Louis reports grants and personal fees for advisory board work from GSK, AstraZeneca and Novartis, grants from Chiesi, outside the submitted work. Conflict of interest: V. Plaza reports grants, personal fees and nonfinancial support from Chiesi, grants and personal fees from AstraZeneca, personal fees from ALK, Mundipharma and Sanofi, grants from Menarini, outside the submitted work. Conflict of interest: C. Porsbjerg has nothing to disclose. Conflict of interest: D. Ramos-Barbon has nothing to disclose. Conflict of interest: L.B. Richards has nothing to disclose. Conflict of interest: S. Škrgat reports personal fees for lectures and scientific discussion at symposia from Teva and Boehringer, personal fees for lectures and advisory boards from AstraZeneca, Glaxo, Berlin-Chemie and Chiesi, outside the submitted work. Conflict of interest: J.K. Sont has nothing to disclose. Conflict of interest: S.J.H. Vijverberg has nothing to disclose. Conflict of interest: E.J. Weersink has nothing to disclose. Conflict of interest: V. Yasinska has nothing to disclose. Conflict of interest: S.S. Wagers reports consultancy fees from the European Respiratory Society, during the conduct of the study; consultancy fees from King's College Hospital NHS Foundation Trust, Academic Medical Research, AMC Medical Research BV, Asthma UK, Athens Medical School, Boehringer Ingelheim International GmbH, CHU de Toulouse, CIRO, DS Biologicals Ltd, École Polytechnique Fédérale de Lausanne, European Respiratory Society, FISEVI, Fluidic Analytics Ltd, Fraunhofer IGB, Fraunhofer ITEM, GSK R&D Ltd, Holland and Knight, Karolinska Institutet Fakturor, KU Leuven, Longfonds, National Heart and Lung Institute, Novartis Pharma AG, Owlstone Medical Ltd, PExA AB, UCB Biopharma SPRL, UCB Biosciences GmbH, Umeå University, University Hospital Southampton NHS Foundation Trust, Università Campus Bio-Medico di Roma, Universita Cattolica Del Sacro Cuore, Universität Ulm, University of Bern, University of Edinburgh, University of Hull, University of Leicester, University of Loughborough, University of Luxembourg, University of Manchester, University of Nottingham, Vlaams Brabant, Dienst Europa, Imperial College London, Boehringer Ingelheim, Breathomix, Gossamer Bio, AstraZeneca and CIBER, outside the submitted work. Conflict of interest: R. Djukanovic reports receiving fees for lectures at symposia organised by Novartis, AstraZeneca and Teva, consultation for Teva and Novartis as member of advisory boards, and participation in a scientific discussion about asthma organised by GSK; and is a co-founder and current consultant, and has shares in Synairgen, a University of Southampton spin out company. Conflict of interest: A.H. Maitland-van der Zee reports personal fees for participating in an advisory board from AstraZeneca and Boehringer Ingelheim, unrestricted research grants from Boehringer Ingelheim and GSK., (Copyright ©ERS 2020.)

Background: Indacaterol is a novel, inhaled, once-daily, ultra-long-acting β2-agonist for the treatment of chronic obstructive pulmonary disease (COPD). This randomized, double-blind study compared the bronchodilator efficacy of indacaterol with that of placebo and tiotropium in patients with moderate-to-severe COPD., Methods: In an incomplete-block, multi-dose, three-period, crossover design, patients received three of the following four treatments: indacaterol 150 μg, indacaterol 300 μg, tiotropium 18 μg and placebo, each once-daily for 14 days. Each treatment period was separated by a 14-day washout. Study drug was supplied daily by blinded, third party study personnel to maintain blinding of patients and investigators. The primary efficacy variable was trough forced expiratory volume in one second (FEV1) at 24 h post-dose after 14 days. The study was powered to demonstrate non-inferiority of indacaterol to tiotropium for this variable., Results: A total of 169 patients were randomized (mean age 65 years); 153 (90.5%) completed. Trough FEV1 after 14 days with indacaterol 150 μg and 300 μg was statistically and clinically superior to placebo, with differences (95% CI) of 170 (120-220) and 150 (100-200) mL respectively (both p < 0.001). For this endpoint, both doses of indacaterol not only met the criterion for non-inferiority compared with tiotropium, but also achieved numerically higher values, with differences versus tiotropium of 40 and 30 mL for indacaterol 150 and 300 μg, respectively. At 5 min post-dose on Day 1, the mean FEV1 for both indacaterol doses was significantly higher than placebo (by 120 and 130 mL for indacaterol 150 and 300 μg, respectively; p < 0.001) and tiotropium (by 80 mL for both doses; p < 0.001). Adverse events were reported by similar proportions of patients: 31.4%, 29.5%, 28.3% and 28.5% for indacaterol 150 μg and 300 μg, tiotropium and placebo treatments, respectively., Conclusions: Once-daily indacaterol provided clinically and statistically significant 24-h bronchodilation. Indacaterol was at least as effective as tiotropium, with a faster onset of action (within 5 min) on the first day of dosing. Indacaterol should prove useful in patients with moderate-to-severe COPD, for whom treatment with one or more classes of long-acting bronchodilator is recommended., Trial Registration: ClinicalTrials.gov: NCT00615459, EudraCT number: 2007-004071-19.

Background: Gamma-delta (gammadelta) T cells regulate immune responses to foreign protein at mucosal surfaces. Whether they can modify allergen-induced early (EAR) and late airway responses (LAR) is unknown., Objective: We have tested the hypothesis that the CD8+ subtype of gammadelta T cells decreases allergen-induced LAR and airway eosinophilia in the rat., Methods: Brown Norway rats were administered, intraperitoneally, 3.5 x 10(4) lymph node CD8+gammadelta T cells from naive or sensitized rats. The recipients were sensitized to ovalbumin (OVA) in Al(OH)(3) 3 days after cell transfer and challenged with aerosolized OVA 14 days later. Serum IgE was measured before allergen challenge. After challenge, lung resistance was monitored for 8 hours and then bronchoalveolar lavage (BAL) was analyzed for eosinophil major basic protein (MBP), IL-4, IL-5, IL-13, and IFN-gamma messenger RNA-expressing cells., Results: gammadelta T cells from naive donors significantly decreased LAR in OVA-challenged sensitized rats, whereas MBP(+) eosinophils were decreased by both gammadelta T cells from naive and sensitized donors. EAR and serum IgE levels were unchanged. The expression of IL-4, IL-5, and IL-13 by BAL cells of gammadelta T cell recipients was attenuated compared with OVA-challenged controls. This was accompanied by an increase in the expression of IFN-gamma., Conclusions: Our results are consistent with a suppressive role of CD8+gammadelta T cells on allergic airway responses. However, only gammadelta T cells from naive donors inhibit LAR.